New sources layout

Change-Id: Ic716f336b7071063997cf5b4dae6d50e0b4631e9

minix/kernel/system/do_exec.c

@@ -0,0 +1,60 @@
+/* The kernel call implemented in this file:
+ *   m_type:	SYS_EXEC
+ *
+ * The parameters for this kernel call are:
+ *   m_lsys_krn_sys_exec.endpt		(process that did exec call)
+ *   m_lsys_krn_sys_exec.stack		(new stack pointer)
+ *   m_lsys_krn_sys_exec.name		(pointer to program name)
+ *   m_lsys_krn_sys_exec.ip		(new instruction pointer)
+ *   m_lsys_krn_sys_exec.ps_str		(struct ps_strings *)
+ */
+#include "kernel/system.h"
+#include <string.h>
+#include <minix/endpoint.h>
+
+#if USE_EXEC
+
+/*===========================================================================*
+ *				do_exec					     *
+ *===========================================================================*/
+int do_exec(struct proc * caller, message * m_ptr)
+{
+/* Handle sys_exec().  A process has done a successful EXEC. Patch it up. */
+  register struct proc *rp;
+  int proc_nr;
+  char name[PROC_NAME_LEN];
+
+  if(!isokendpt(m_ptr->m_lsys_krn_sys_exec.endpt, &proc_nr))
+	return EINVAL;
+
+  rp = proc_addr(proc_nr);
+
+  if(rp->p_misc_flags & MF_DELIVERMSG) {
+	rp->p_misc_flags &= ~MF_DELIVERMSG;
+  }
+
+  /* Save command name for debugging, ps(1) output, etc. */
+  if(data_copy(caller->p_endpoint, m_ptr->m_lsys_krn_sys_exec.name,
+	KERNEL, (vir_bytes) name,
+	(phys_bytes) sizeof(name) - 1) != OK)
+  	strncpy(name, "<unset>", PROC_NAME_LEN);
+
+  name[sizeof(name)-1] = '\0';
+
+  /* Set process state. */
+  arch_proc_init(rp,
+	(u32_t) m_ptr->m_lsys_krn_sys_exec.ip,
+	(u32_t) m_ptr->m_lsys_krn_sys_exec.stack,
+	(u32_t) m_ptr->m_lsys_krn_sys_exec.ps_str, name);
+
+  /* No reply to EXEC call */
+  RTS_UNSET(rp, RTS_RECEIVING);
+
+  /* Mark fpu_regs contents as not significant, so fpu
+   * will be initialized, when it's used next time. */
+  rp->p_misc_flags &= ~MF_FPU_INITIALIZED;
+  /* force reloading FPU if the current process is the owner */
+  release_fpu(rp);
+  return(OK);
+}
+#endif /* USE_EXEC */